Thank you for the question and pictures.Although I do not believe that you have symmastia you definitely have medially positioned breast implants and sternal skin tenting. Generally speaking, symmastia (or medial malposition or “uni-boob”) occurs when the breast implants move too far toward the midline--the two implants may actually touch one another in the center of the chest. If the horizontal muscle that is connected to the sternum and goes across the implant is cut during surgery, then the implant can move toward the middle of the chest. Again generally speaking, symmastia may result from overly aggressive attempts to alter chest wall anatomy trying to increase cleavage for patients. This outcome is made worse by use of larger implants in thin patients, and is a problem for implants over or under the muscle, though sub muscular implant placement allows the muscle to provide some softening of the transition to the cleavage area from the augmented breast mound. Correction involves use of internal sutures of the capsule around the breast implants. Often, it is necessary to expand the breast implant pocket laterally (outwardly) to allow for correct placement of the implants.Correction of symmastia involves careful planning and intra-operative reinforcement of the medial fold of the breasts. Reconstruction usually involves removal of the breast implants and internal suture reinforcement of the involved area. The use of dyes and needles through the skin surface assists the exact placement of permanent sutures. Usually the breast implant capsule that is redundant is removed to allow for two raw surfaces to heal together, presumably lowering the rate of recurrence of the symmastia.Often, it is necessary to “open” the breast implant pocket laterally (outer breast fold) to allow for positioning of the implant centrally behind the breast mound. This maneuver may also decrease the amount of implant pressure against the medial suture line. Use of a smaller breast implant, if possible, may serve the same purpose.Correction of implant malposition issues does require some experience; make sure your plastic surgeon can demonstrate his/her experience level. I hope this, and the attached link (dedicated to symmastia surgery concerns), helps.Best wishes.